133681608133 has 2 divisors, whose sum is σ = 133681608134. Its totient is φ = 133681608132.

The previous prime is 133681608091. The next prime is 133681608209. The reversal of 133681608133 is 331806186331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133398796644 + 282811489 = 365238^2 + 16817^2 .

It is an emirp because it is prime and its reverse (331806186331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133681608133 - 2²¹ = 133679510981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133681608133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133681608433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66840804066 + 66840804067.

It is an arithmetic number, because the mean of its divisors is an integer number (66840804067).

Almost surely, 2^133681608133 is an apocalyptic number.

It is an amenable number.

133681608133 is a deficient number, since it is larger than the sum of its proper divisors (1).

133681608133 is an equidigital number, since it uses as much as digits as its factorization.

133681608133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 133681608133 in words is "one hundred thirty-three billion, six hundred eighty-one million, six hundred eight thousand, one hundred thirty-three".